Herbicide


Combustion in an incinerator is the only practical way to deal with many waste streams.This is particularly true of solid and concentrated wastes and toxic wastes such as those containing halogenated hydrocarbons, pesticides, herbicides, etc. Many of the toxic substances encountered resist biological degradation and persist in the natural environment for a long period of time. Unless they are in dilute aqueous solution, the most effective treatment is usually incineration.  [c.299]

Incineration of toxic materials such as halogenated hydrocarbons, pesticides, herbicides, etc. requires a sustained temperature of 1100 to 1300°C in an excess of oxygen. The incinerator stack gases will contain acid gases such as hydrogen chloride, oxides of sulfur, and oxides of nitrogen depending on the waste being incinerated. These acid gases require scrubbers to treat the gaseous waste stream. This scrubbing, in turn, produces an aqueous effluent.  [c.299]

Tutorial Modeling the Degradation oFs-Triazine Herbicides in Soil [16]  [c.553]

Figure 10.3-13. s-Triazine herbicides and their half-life ill soil [16],  [c.554]

H Br Effective non 776 selective herbicide in controlling weeds in orchards and forests  [c.135]

C2H4N4. A translocated herbicide, m.p. 157-159 C, used as a non-selective herbicide on fallow land or in established orchards.  [c.30]

CgH,3BrN202. A soil-acting herbicide. White crystalline solid, m.p. 158-159" C. It is a non-selective inhibitor of photosynthesis used for weed control In citrus and cane fruit plantations. It is relatively non-toxic to animal life.  [c.67]

CtHjCIjNS, PhC(S)NH2, a herbicide with a high level of biological activity.  [c.96]

CgHftCljOa- A selective growth regulator herbicide for use against broad-leaved plants. White solid m.p. I38°C.  [c.125]

C10H10CI2O3. Colourless crystals m.p. 1 17-I I9°C. A herbicide of similar properties to 2,4-D, but with greater selectivity.  [c.125]

C]oHi2N20. Yellow solid, m.p. 42 "C. A powerful insecticide and herbicide.  [c.145]

MCPB, 4-(4-chloro-2-methylphenoxy)-butyric acid, CiiHisClOj. A compound in itself harmless to plants, but when absorbed and translocated in the cells, CnHuClOs is converted to a powerful herbicide, and results in the death of the plant. Acts as a selective weedkiller. Other butyric acid derivatives used commercially are 2,4-Dg and 2,4,5-Tb, the butyric acid analogues of 2,4-D and 2,4,5-T.  [c.252]

C, b.p. — 60°C. Occurs naturally in some plants, in herring bnne andjn crude bone oil. It may be prepared in the laboratory by heating formalin with ammonium chloride, when it is obtained as the crystalline hydrochloride. Monomelhylamine is largely employed in the manufacture of herbicides, fungicides and surface-active agents.  [c.260]

Dimeihylamine, C2H7N, (CH3)2NH. Colourless, inflammable liquid with an ammoniacal odour, mp -96" C, b.p. 7°C. Occurs naturally in herring brine. Prepared in the laboratory by treating nitrosodimetbyl-aniline with a hot solution of sodium hydroxide. Dimethylamine is largely used in the manufacture of other chemicals. These include the solvents dimethylacetamide and dimethyl-formamide, the rocket propellant unsym-metrical dimethylhydrazine, surface-active agents, herbicides, fungicides and rubber accelerators.  [c.260]

CgHjClaOj. M.p. 155°C. Used as a selective herbicide. It is made from 2,4,5-trichloro-pheno) and sodium chloroacetate. Ester sprays and combined ester sprays with 2,4-D are available. 2,4,5-T products are of particular value in that they control many woody species, and eradicate perennial weeds such as nettles in pastures.  [c.384]

This latter part consists of an external file, the reaction rules. First, in the reaction rule header, specifications are made about the applicability of the individual reaction types that arc to follow further down in the rule file. This header might specify that the reaction rules apply to degradation reactions in the environment, to biochemical pathways, or to fragmentations and rearrangements in the mass spectrometer. Each reaction rule. specifies the bond and electron rearrangement in the couise of a leaction type, then gives constiainfs, i.e, information on atoms and bonds to which the specified reaction scheme is appUcalile (the reaction center). Figure 10.3-8 shows the two reaction types responsible for the degradation of s-triazine herbicide.s in soil hydrolysis and reductive dealkylation. Both reaction types have the same general scheme, breaking two bonds and making two bonds  [c.550]

The question is now Which reaction pathways arc Followed, and to what extent This asks for a detailed modeling of the kinetics of the individual reaction steps of this network. This can be achieved on the basis of the half-lives of four s-triazinc herbicides in soil [17]. Figure 10.3-13 shows the four compounds For which data were Found in the literature.  [c.553]


See pages that mention the term Herbicide : [c.27]    [c.32]    [c.44]    [c.46]    [c.51]    [c.54]    [c.95]    [c.115]    [c.121]    [c.142]    [c.143]    [c.144]    [c.202]    [c.208]    [c.249]    [c.297]    [c.304]    [c.306]    [c.360]    [c.363]    [c.403]    [c.403]    [c.404]    [c.425]    [c.540]    [c.553]    [c.553]    [c.133]    [c.137]    [c.137]    [c.137]    [c.438]    [c.438]   
Thiazole and its derivatives Ч.2 (1979) -- [ c.133 , c.134 , c.135 , c.136 , c.438 , c.439 , c.440 ]